HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Boyd, M. F. Articles by Matthews, C. B. Search for Related Content PubMed Articles by Boyd, M. F. Articles by Matthews, C. B.

On the Natural Transmission of Infection from Patients Concurrently Infected with Two Strains of Plasmodium Vivax¹

In a previous paper (1) it was reported that the simultaneous presence of two strains of Plasmodium vivax apparently delayed the development of an adequate homologous immunity to either strain. The present paper records observations bearing on the ability of anophelines to transmit either or both strains when infected from the patients previously mentioned as concurrently infected with two strains of P. vivax.

In the experiments reported the strains of P. vivax employed are designated as the McCoy and Cuban. Their dissimilarity is indicated not only by the circumstance of their different provenance, but by the results of cross immunity tests as well (2). In this connection it may be recalled that the infectiousness of a patient infected with a single strain of P. vivax very closely coincides with the period of clinical activity (3). We have assumed that both strains of parasites participated in the clinical attack experienced by the patients given the simultaneous double inoculations, and that it is unlikely that the gametogeny of either would be influenced by the presence of the other.

Received November 25, 1940.
¹ The studies and observations on which this paper is based were conducted with the support and under the auspices of the International Health Division of the Rockefeller Foundation, in cooperation with the Florida State Board of Health and the Florida State Hospital.